V56MA2A

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Varistors, MOVs, and Transient Voltage Suppression (TVS) diodes are three components that all deal with electrical transients but in slightly different ways. Varistors are voltage-dependent, non-linear resistors, while MOVs are metal oxide varistors. Both of these components protect against transient spikes, while TVS diodes are used to suppress voltage transients. It is important to understand the differences between these components and the application fields and working principles of each.

Varistors, also known as Voltage Dependent Resistors (VDRs), are non-linear resistors with a voltage-dependent resistance. They are available in both cylindrical and radial geometries, and are constructed of sintered piezoelectric material, Selenium, Aluminum Oxide, or Silicon Carbide. Varistors allow current to flow until a preset voltage limit is reached, then block the current completely. These components have a fast responding time, high surge current rating, and are available in wide voltage ranges.

One example of a varistor is the V56MA2A, which is a radial disk-style varistor with 7mm diameter. It has a maximum clamping voltage of 400V and a rated energy of 2.2J. Its response time is less than 5 nanoseconds, and it is typically used in automotive, industrial, and telecom applications. It can be used to clamp transient voltages, reduce EMI, and limit the surge energy to connected devices.

Metal oxide varistors (MOVs) are similar to varistors but with an extra layer of oxide insulation around the ceramic disk. This oxide layer makes them more robust and suitable for situations where increased capacitance and inrush current are expected. MOVs are primarily used for the protection of high-value circuits in switch mode power supplies; they are designed to handle an inrush/surge of up to a few thousand amperes. They also have a decaying waveform that is designed to protect against loudspeaker spikes.

Transient Voltage Suppression (TVS) diodes are designed to suppress voltage transients and prevent damage to connected electronic components. They are often used in automotive and industrial applications where there is a need for protection against short voltage and current spikes. TVS diodes come in many forms but typically have a clamping voltage of around 10 to 20 volts and a hold current of 5 amperes or higher. They are usually deployed in series with the circuit they are supposed to protect, so that they can block or divert the surge current away from the device.

All three of these components have a range of application fields and working principles that offer effective protection against transient voltage and current spikes. Varistors and MOVs are both used to protect against transient spikes, and TVS diodes are used to suppress voltage transients. It is important to understand the differences between these components so that circuit designers can make the best choice for their application needs.

The specific data is subject to PDF, and the above content is for reference